Vehicle inclosure heating and ventilating means



Patented Mar. 29, 1'92/7.

UNITED STATES WILLIAM G. DUNN, OF CLARINDA, IOWA.

VEHICLE INCLOSURE HEATING AND VENTILATmG IIEANS. I

Application led February 24, 1925. Serial No. I11,264.

Since the advent of the closed car, it has become common` practice toinstall some sort of a heating device whiclrusually utilizes 'theradiated heat on surfaces of the exhaust i manifold for heating air tobe supplied to the interior of the vehicle body. No provij sion howeverhas been made, in so far as I am advised, for exhausting any air fromrthe interior of the body to cause the hot air to more'rea'dily enterand circulate within such body. Thus, the eliiciency of most heaters israther low, but it is the object of the present invention to provide asuctionl passage which leads from the interior of the car body to theair intake o f the carbureter, so that the air will be withdrawn fromthe interior of the body, ythereby greatly facilitating ent-rance of theheated air.v This arrangement also provides for eifective ventilation ofthe body by withdrawing obnoxious.

gases which may accumulate therein, particularly when the motor isidling. Furthermore, by supplying the carbureter with air from theinterior of the body, practically no 5 road dust,and other foreignmatter will enter the carbureter and the engine cylinders, with obviousadvantages.

It is common practice to utilize a portion yof the exhaust pipe from themanifold or a partof the exhaustmanifold itself, to preheat the airsupplied to the carbureter, and it is a further aim of the invention toprovide a construction which will permit the continuance of thispractice.

It is a still further aim of the invention to provide novel damper meanswhereby air may be supplied to the carbureter totally from the interiorof the body, totally from the exterior of said body. or partly from one40 source and partly from the other.

Yet another aim is to make provision whereby a back-fire through thecarbureter cannot cause the discharge of any lgases into the interior ofthe body, provision being made whereby such gases are expelled,

Athrough the instrumentality of a pressureopened valve for thecarburete'r air intake.

Another aim is to make provision for carrying out the invention in anextremely sim- 5 ple and inexpensive, yet in an efiicient manner,permitting practically any machine to be easily equipped with suchinvention.

An additional object is to provide an invention which is not restrictedto land vehicles for carrying out the above or other'A ob- ]ects, b utmay e used to equal advantage uplon aircraft'or any other type ofvehicle w ich 1s propelled by an internal combustion motor and lisclosure. A

With the foregoing in view, the invention resides in the novel subjectmatter hereinafter described and claimed, thedescription bemgsupplemented by the accompanying drawing.

Figure 1 isr a-sectional view partly in elevation, showing theapplication of the int,vention to a well Aknown type of` automobile.

Figure 2 is an enlarged view similar to a p ortlon of Fig. 1, butillustrating the hot gir supplying and exhausting means in sec- 1on. 4Figures 3, 4 and 5 are detail sectional views as indicated by the lines3 3, 4-4

and 5-5 of Fig. 2.

In the drawmgs above brieiiy described, one of the many ways of carryingthe inv/ention into effect, isillustrated. M designates an internalcombustion motor for propllin an automobile, a portion of whose dy 1sindicated atjB. The motor M is of provided with an occupant in-` courseprovided-with the usilal carbureter C, intake manifold I, exhaustmanifold E, and exhaust pipe P. I have illustrated a jacket or hood Jar'ound the exhaust'manifold E, said jacket having a neck N fordischarging hot air into the body B, said neck being kcontrolled by adamper D which if desired, may also operateto admit any de- -siredquantity of outside air, through openings O in the neck N. This damperma be of such form as'tp discharge hot air om the jacket J to the atmhere, when it is in position to prevent disc arge of such air into thebody.

Within the hood or jacket J, an arched plate A has been shown upon theexhaust I manifold E, said plate having heat radiating fins F, and itwill be seen that by providing these fins or some equivalent tins on theexhaust manifold, its efficiency for heating the air passing through thejacket, is increased. I wish it understood however that whiletlie finsare preferably used and the type ofeair heater shown, may well beemployed, my invention is not restricted to the use of anyparticulartype of heater,

means leads in some manner from the in-` terior of the body to the airintake of the carbureter and in the present instance, such means isshown discharging into a branch 3 at the upper side of the pipe 1. Itmay here be stated however. that instead of using this pipe and itsvalve 2. other provision fcould well be made for the relief of back- Inthe construction illustrated, Aan airheating drum 4 is provided around aportion of the exhaust pipe P. said drum being' equipped with an airinlet neck 5 which eX- tends to the interior of the car bodv. said drumhaving also an air outlet 6 which is connected with the branch 3 of thepipe 1. yIn the preferred form of construction. the

neck 5 has dampered communication with the interior of the car bodv andis also provided with one or more fresh air inlets 7 for admitting thefree air at the exterior of said bodv. .said fresh air inlet or 'inletsbeing also damper-controlled. In the con-l struction illustratcd.several o f the fresh air inlets 7 are shown iu the cvlindrical sidewall of the neck 5. while a plurality of air inlet openings 8 are shownin an upper end wall 9 with which the neck 5 is provided. A damper plate10 operates over the end wall 9 and is provided with openings 11 whichmay be registered to any desired eX- tent with the openings 8. or movedentirely7 out of register therewith. and movable bodilv with the damperplate 10. is a damper sleeve 1Q which surrounds the neck 5 and is formedwith spaced openings 13 which may register totally or partially with theinlets 7. or may be moved entirely out of communication therewith. Thedamper 10-12 is so constructed that when the openings 8 are entirelvopen. the inlets 7 are entirely closed and viceversa. and as theopenings 8 are gradually closed. the openings 7 are graduallyT opened.Thus. all air supplied to the carbureter may he taken from the -interiorof the hodv. or it inav be taken from the exterior of the body. It willfurther be noted that some air'mav he taken from the outside of the bodyand some of it conducted from the in'ide thereof, as occasion maydcmand.

B v providing the construction shown and described or any otherpreferred construction for obtaining the same results, not only can theoccupant-inclosure be more effectively heated, but it is adequatelyventilated and practically no foreign matter can enter the carbureter.

AS excellent results may be obtained from the vgeneral constructionshown and described, it may well be followed. but obviously a greatnumber of changes may be made within the scope of the invention asclaimed. For instance, any desired forni of heater may be used inconnection with the air conducting passage from the interior of theoccupant-inclosure to the carbureter. or in some instances. the heatermay be entirely dispensed with; any desired form of damper may beemployed but this is also an ele-.

ment which might in some cases be omitted; a lip 14 hasbeen shown in thepipelto direct back-fire gases away from the branch 3, but otherprovision could be made for this purpose; and While heat-radiating tins15 have been shown on theexhaust pipe P, within the drum 4, it will beunderstood that they are not absolutely essential.

I claim:

1. In a vehicle having an internal combustion motor, an occupantinclosure, a hot air inlet for said inclosure. and means for heating theair entering said hot air inlet; a suction passage leading from saidoccupant inclosure to the air inlet of the carbureter and embodying anair heater, whereby the suction produced by the motor will induce theheated air to enter the occupant inclosure through said hot. air inlet,Will cause circulation of the heated air in the inclosure to heat thelatter, will Withdraw the heated air from the inclosure, and in sowithdrawing said air will subject it to the heating action of said airheater, thereby additionally heating the air to insure thoroughvaporization of the fuel with which it is mixed by `said carbureter.

2. In a vehicle having an internal co'mbustion motor and an occupantinclosure; a suction passage from said inclosure to the carbureter airintake of the motor, back-fire relief means from said air intake, andmeans for preventing back-fire fumes from discharging through saidpassage into the occupant inclosure.

In a vehicle having an internal cornbustion motor, an occupantinclosure, a hot air inlet for said inclosure, and means for heating theair entering said inlet; a suction passage leading to the carbureter airintake of the motor and having one air inlet leading from the interiorof the aforesaid inclosure to withdraw air therefrom and induce hot airto enter said inclosure through said hot air inlet for the purpose ofheating the inclosure. said suction passage also having another air;inlet leading from the air at the exterior of said inclosure, anddamper' means for said inlets of said passage under a common control andoperative to'totally or partially close one of said inlets andsimultaneously effect total or partial opening of the other inlet,whereby at one operation, both theheating of the occupant inclosure andthe temperature of the air entering the carbureter, may be regulatedaccording to the tenlperature outside of said inclosure.

4. In combination with a vehicle 'having an internal combustion motor,an occupant. inclosure. and an exhaust pipe from the niotor extendingunder a floor board of said occupant inclosure: an air heatersurrounding a portion of said exhaust pipe and having an upstanding airinlet neck and a downwardly projecting discharge neck. the latter beingconnected with the air inlet of the motor carbureter. said air inletneck having a fresh air inlet in its walland a warm air inlet in itsupper end for communication with the interior of the occupantcompartment, a damper sleeve rotatably 'surrounding said air inlet neckand having a fresh air inlet for registrationwith the first named freshair inlet, and a damper plate carried by said sleeve for controlling theadditional air linlet at the upper end of said first named nec 5. In avehicle having an internal combustion motor and an occupant inclosure;an air inlet p1 sure-opened valve, and an air inletpassage joining saidpipe between the carbureter and said valve and leading from the interiorof said inclosure, said pipe having internal means for directing anoutrush of gases away from said air inlet passage.

In testimony whereof I have hereunto allixed my signature.

' WILLIAMKG. DUNN.

leading to the carbureter air in-A take an having an outwardly movablepres-

